It sounds like random static to your ears but it is a variable oscillating frequency that masks your in person conversations. The sound from the white noise jammer constantly varies in frequency and amplitude. Keep your private conversations private! The AJ-40 Rechargeable Audio Jammer / White noise generator protects your private room conversations by generating a un-filterable masking sound which desensitizes any near-by microphones. Thermal Imaging and Temperature Detection Cameras.
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